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Find the Sum or Difference $\left( 7 n ^ { 6 } - 9 n + 2 n ^ { 3 } \right) + \left( 7 n ^ { 3 } + 6 n ^ { 6 } - 4 n \right)$

Question 570

Multiple Choice

Find the sum or difference.
- $\left( 7 n ^ { 6 } - 9 n + 2 n ^ { 3 } \right) + \left( 7 n ^ { 3 } + 6 n ^ { 6 } - 4 n \right)$

A) $13 n ^ { 6 } + 9 n ^ { 3 } - 13 n$
B) $13 n + 9 n ^ { 6 } - 13 n ^ { 3 }$
C) $- 3 n ^ { 6 } + 14 n ^ { 3 } - 2 n$
D) $9 \mathrm { n } ^ { 10 }$

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